WO2016165092A1 - Procédé de rétroaction et de réception, dispositif et système de communication pour indicateur de matrice de précodage - Google Patents

Procédé de rétroaction et de réception, dispositif et système de communication pour indicateur de matrice de précodage Download PDF

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Publication number
WO2016165092A1
WO2016165092A1 PCT/CN2015/076691 CN2015076691W WO2016165092A1 WO 2016165092 A1 WO2016165092 A1 WO 2016165092A1 CN 2015076691 W CN2015076691 W CN 2015076691W WO 2016165092 A1 WO2016165092 A1 WO 2016165092A1
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WIPO (PCT)
Prior art keywords
pmi
noma
user equipment
rank
base station
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PCT/CN2015/076691
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English (en)
Chinese (zh)
Inventor
张健
王昕�
周华
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富士通株式会社
张健
王昕�
周华
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 富士通株式会社, 张健, 王昕�, 周华 filed Critical 富士通株式会社
Priority to CN201580077526.2A priority Critical patent/CN107409009A/zh
Priority to PCT/CN2015/076691 priority patent/WO2016165092A1/fr
Publication of WO2016165092A1 publication Critical patent/WO2016165092A1/fr
Priority to US15/722,681 priority patent/US20180026699A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H04B7/0486—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking channel rank into account
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0023—Interference mitigation or co-ordination
    • H04J11/0026—Interference mitigation or co-ordination of multi-user interference
    • H04J11/0036—Interference mitigation or co-ordination of multi-user interference at the receiver
    • H04J11/004—Interference mitigation or co-ordination of multi-user interference at the receiver using regenerative subtractive interference cancellation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2626—Arrangements specific to the transmitter only
    • H04L27/2646—Arrangements specific to the transmitter only using feedback from receiver for adjusting OFDM transmission parameters, e.g. transmission timing or guard interval length
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a feedback and reception method, apparatus, and communication system for a Precoding Matrix Indicator (PMI) of Non-Orthogonal Multiple Access (NOMA).
  • PMI Precoding Matrix Indicator
  • NOMA Non-Orthogonal Multiple Access
  • the theoretical research work of the fifth generation (5G) mobile communication technology has gradually begun.
  • One of the requirements of the 5G communication system is to support a higher system capacity (for example, 1000 times) than 4G and more terminal connections (for example, 100 times) than 4G.
  • mobile communication has adopted orthogonal multiple access technology.
  • Research shows that non-orthogonal multiple access technology can realize larger capacity domain than orthogonal multiple access technology.
  • This theoretical guidance makes non-orthogonal multiple access technology become 5G research.
  • One of the key technologies One of the key technologies.
  • NOMA Non-orthogonal
  • LTE-A Release 13 One of the ways to achieve non-orthogonality is that the power domain is non-orthogonal, and its representative technology, NOMA, has been included in the discussion of LTE-A Release 13. NOMA technology is based on the theory of superposition codes. The transmitting end sends superimposed symbols, and the receiving end needs to use SIC (Successive Interference Cancel) technology to separate and recover data information. For the case where the transmitting end uses a single antenna, the NOMA technology can theoretically realize the entire capacity domain of the downlink broadcast channel and the uplink multiple access channel.
  • SIC Successessive Interference Cancel
  • the inventor has found that the NOMA can multiplex the user equipment in the power domain.
  • the key is that the user equipment performing the SIC can demodulate the data of other user equipments and delete the interference of the data to its own useful signal, which requires the user equipment of the SIC.
  • demodulating an interfering signal which is a useful signal to other user equipment
  • it has a higher signal to interference and noise ratio than other user equipment demodulating its own useful signal.
  • MIMO Multiple Input Multiple Output
  • OFDM Orthogonal Frequency Division Multiplexing
  • Embodiments of the present invention provide a NOMA PMI feedback and reception method, apparatus, and communication system.
  • the user equipment feeds back auxiliary PMI information (ie, NOMA PMI) to provide reference information for the base station to perform NOMA scheduling, so that the base station can schedule appropriate user equipment to ensure SIC performance.
  • auxiliary PMI information ie, NOMA PMI
  • a method for receiving a PMI is provided, which is applied to a base station of a NOMA system, where the feedback method includes:
  • the NOMA scheduling is performed according to the NOMA PMI fed back by a plurality of user equipments.
  • a receiving apparatus for a PMI which is configured in a base station of a NOMA system, and the feedback apparatus includes:
  • the scheduling unit performs NOMA scheduling according to the NOMA PMI fed back by the multiple user equipments.
  • a PMI feedback method for a user equipment of a NOMA system, where the feedback method includes:
  • the OFDM PMI and the NOMA PMI are fed back to the base station.
  • a feedback device of a PMI which is configured in a user equipment of a NOMA system, and the feedback device includes:
  • the indication determining unit determines an OFDM PMI of rank r and a NOMA PMI of rank Nr; wherein r represents a rank number of the user equipment, and Nr represents a number of receive antennas of the user equipment and a number of transmit antennas of the base station Minimum value
  • a communication system using NOMA comprising:
  • the user equipment determines and feeds back an OFDM PMI of rank r and a NOMA PMI of rank Nr; where r represents the rank of the user equipment, and Nr represents the number of receive antennas of the user equipment and the number of transmit antennas of the base station Minimum value
  • a computer readable program wherein when the program is executed in a base station, the program causes a computer to perform a receiving method of the PMI as described above in the base station.
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a receiving method of a PMI as described above in a base station.
  • a computer readable program wherein when the program is executed in a user device, the program causes a computer to perform a feedback method of a PMI as described above in the user device .
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a feedback method of a PMI as described above in a user equipment.
  • An advantageous effect of the embodiment of the present invention is that the user equipment feeds back an OFDM PMI with a rank r and a NOMA PMI with a rank of Nr, and provides reference information for the base station to perform NOMA scheduling, so that the base station can schedule a suitable user equipment to ensure SIC performance. Thereby, SIC error propagation in a MIMO system using NOMA can be reduced.
  • FIG. 1 is a schematic diagram of a MIMO system according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a method for receiving a PMI according to Embodiment 1 of the present invention
  • FIG. 3 is a schematic diagram of a feedback method of a PMI according to Embodiment 2 of the present invention.
  • FIG. 4 is a schematic diagram of a receiving apparatus of a PMI according to Embodiment 3 of the present invention.
  • Figure 5 is a schematic diagram of a base station according to Embodiment 3 of the present invention.
  • FIG. 6 is a schematic diagram of a feedback device of a PMI according to Embodiment 4 of the present invention.
  • FIG. 7 is a schematic diagram of a user equipment according to Embodiment 4 of the present invention.
  • Figure 8 is a schematic diagram of a communication system according to Embodiment 5 of the present invention.
  • the user equipment UE1 experiences the channel representation as H 1
  • the noise is represented as n 1
  • the path loss is represented as ⁇ 1
  • the user equipment UE2 experiences the channel representation as H 2 .
  • the noise is expressed as n 2 and the path loss is expressed as ⁇ 2 .
  • the base station transmits the symbols a 1 , a 2 to the user equipment UE1 using the NOMA method, and the precoding vectors used are denoted by w 1 , w 2 ; the base station transmits the symbol b 1 to the user equipment UE2, and the pre- The coding vector is w 1 .
  • FIG. 1 is a schematic diagram of a MIMO system according to an embodiment of the present invention, showing a case of two user equipments performing NOMA scheduling. As shown, the user equipment UE1 and a user equipment UE2 NOMA power only in the domain multiplexed beam 1 w 1.
  • the base station allocates different powers for different symbols, and uses the same time-frequency resource to transmit superimposed symbols on one power domain.
  • the NOMA superimposed symbol transmitted by the base station is
  • the received symbols of the user equipment UE1 and the user equipment UE2 are respectively represented as
  • the user equipment UE2 After receiving the signal sent by the base station, the user equipment UE2 independently demodulates the self symbol b 1 ; the user equipment UE1 demodulates b 1 for the purpose of SIC, deletes the b 1 interference and demodulates the self symbol a 1 , a 2 .
  • the User Equipment UE1 demodulates the user equipment UE2 symbols b 1 ratio of signal to interference noise referred to as SINR 1d2, the user equipment UE2 demodulates the signal to interference noise itself symbols b 1 ratio denoted SINR 2d2, referred to as the noise power ⁇ 2, then Have
  • User equipment UE1 can successfully demodulated symbols b 1 user equipment UE2 needs to meet SINR 1d2> SINR 2d2, but above SINR 1d2, SINR 2d2 expression does not always guarantee SINR 1d2> SINR 2d2 established, demodulation error for b 1 of the The error propagation is directly affected, which directly affects the demodulation of the user equipment UE1 for a 1 , a 2 .
  • the embodiment of the invention provides a method for receiving a PMI, which is applied to a base station of a NOMA system.
  • FIG. 2 is a schematic diagram of a method for receiving a PMI according to an embodiment of the present invention. As shown in FIG. 2, the method for feeding the PMI includes:
  • Step 201 The base station receives an OFDM PMI with a rank r and a NOMA PMI with a rank of Nr, which are fed back by the user equipment, where r represents the rank of the user equipment, and Nr represents the number of receiving antennas of the user equipment and the base station. The minimum of the number of antennas;
  • Step 202 The base station performs NOMA scheduling according to the NOMA PMI fed back by the multiple user equipments.
  • the PMI fed back by the user equipment may include an OFDM PMI of rank r (ie, a conventional PMI) and a NOMA PMI of rank Nr, where r represents the rank of the user equipment, and Nr represents the user equipment.
  • r represents the rank of the user equipment
  • Nr represents the user equipment.
  • rank-1 PMI traditional OFDM PMI
  • the user equipment UE2 can also feed back a rank of 2 (rank-2; as described above, both the base station and the user equipment are configured with two antennas, that is, the number of receiving antennas of the user equipment.
  • the number of transmit antennas of the base station is 2, so the Nr is also 2) PMI (which may be referred to as NOMA PMI), which is used to characterize the complete channel matrix direction of the user equipment UE2.
  • NOMA PMI which may be referred to as NOMA PMI
  • the base station After receiving the NOMA PMI of the complete channel matrix information that is fed back by the user equipment, the base station performs the corresponding NOMA user scheduling according to the NOMA PMI, that is, the NOMA pairing transmission may be selected in two or more user equipments that feed back the same NOMA PMI. User equipment.
  • the base station selects two user equipments that feed back the same NOMA PMI to perform NOMA scheduling, thereby ensuring that the two user equipments satisfy SINR 1d2 > SINR 2d2 , and can better ensure the SIC performance of the NOMA.
  • selection criteria may be based on distance criteria, so that the direction of the channel H 2 PMI rank-2 is closest. For example, using the chodal distance, select W that minimizes Tr(W H , H 2 )/
  • the precoding matrix identified by the fed back NOMA PMI has the same number of rows and columns as the channel matrix H 2 , that is, the number of rows of the precoding matrix identified by the NOMA PMI is the user equipment.
  • the number of transmitting antennas, the number of columns being the number of receiving antennas of the user equipment.
  • the NOMA PMI can characterize the complete channel matrix direction of the user equipment.
  • the user equipment feeds back the OFDM PMI with rank r and the NOMA PMI with rank Nr, and provides reference information for the base station to perform NOMA scheduling, so that the base station can schedule appropriate user equipment to ensure SIC performance.
  • SIC error propagation in a MIMO system using NOMA can be reduced.
  • the embodiment of the present invention provides a PMI feedback method, which is configured in the user equipment of the NOMA system, and the same content as that in Embodiment 1 is not described herein.
  • FIG. 3 is a schematic diagram of a PMI feedback method according to an embodiment of the present invention. As shown in FIG. 3, the PMI feedback method includes:
  • Step 301 The user equipment determines an OFDM PMI with a rank r and a NOMA PMI with a rank of Nr; where r represents the rank of the user equipment, and Nr represents the number of receive antennas of the user equipment and the number of transmit antennas of the base station.
  • Step 302 The user equipment feeds back the NOMA PMI to the base station.
  • the NOMA PMI is used to quantize the complete channel matrix of the user equipment itself.
  • the user equipment may make the NOMA PMI of the rank Nr and the direction of the channel H2 of the user equipment closest to each other based on the distance criterion.
  • the present invention is not limited thereto, and other methods may be used to determine the PMI of rank Nr.
  • a method may be used in which W which minimizes Tr(W H , H 2 )/
  • the number of rows of the precoding matrix identified by the NOMA PMI is the number of transmit antennas of the user equipment, and the number of columns is the number of receive antennas of the user equipment.
  • the user equipment feeds back the OFDM PMI with the rank r and the NOMA PMI with the rank Nr, and provides reference information for the base station to perform the NOMA scheduling, so that the base station can schedule the appropriate user equipment to ensure Certificate SIC performance.
  • SIC error propagation in a MIMO system using NOMA can be reduced.
  • the embodiment of the invention provides a receiving device of a PMI, which is configured in a base station of the NOMA system.
  • the embodiment of the present invention corresponds to the receiving method of the PMI in Embodiment 1, and the same content is not described herein again.
  • the receiving apparatus 400 of the PMI includes:
  • the receiving unit 401 receives the OFDM PMI of the rank r and the NOMA PMI of the rank Nr fed back by the user equipment; where r represents the rank of the user equipment, and Nr represents the number of receiving antennas of the user equipment and the base station The minimum of the number of transmit antennas;
  • the scheduling unit 402 performs NOMA scheduling according to the NOMA PMI fed back by multiple user equipments.
  • the NOMA PMI is used to quantize the complete channel matrix of the user equipment itself.
  • the scheduling unit 402 is specifically configured to: select, in the user equipment that feeds back the same NOMA PMI, the user equipment that performs the NOMA pairing transmission.
  • the embodiment further provides a base station, which is provided with the receiving device 400 of the PMI as described above.
  • FIG. 5 is a schematic diagram of a structure of a base station according to an embodiment of the present invention.
  • base station 500 can include a central processing unit (CPU) 200 and memory 210; and memory 210 is coupled to central processing unit 200.
  • the memory 210 can store various data; in addition, a program for information processing is stored, and the program is executed under the control of the central processing unit 200.
  • the base station 500 can implement the receiving method of the PMI as described in Embodiment 1.
  • the central processing unit 200 may be configured to implement the functions of the receiving device 400 of the PMI; that is, the central processing unit 200 may be configured to perform control of receiving an OFDM PMI of rank r and a NOM PMI of rank Nr fed back by the user equipment. And performing NOMA scheduling according to the NOMA PMI fed back by the plurality of user equipments; wherein r represents the rank of the user equipment, and Nr represents a minimum of the number of receiving antennas of the user equipment and the number of transmitting antennas of the base station.
  • the base station 500 may further include: a transceiver 220, an antenna 230, and the like; wherein the functions of the foregoing components are similar to those of the prior art, and details are not described herein again. It should be noted that the base station 500 does not have to include all the components shown in FIG. 5; in addition, the base station 500 may further include components not shown in FIG. 5, and reference may be made to the prior art.
  • the user equipment feeds back the OFDM PMI with rank r and the NOMA PMI with rank Nr, and provides reference information for the base station to perform NOMA scheduling, so that the base station can schedule appropriate user equipment to ensure SIC performance.
  • SIC error propagation in a MIMO system using NOMA can be reduced.
  • An embodiment of the present invention provides a PMI feedback device, which is configured in a user equipment of a NOMA system.
  • the embodiment of the present invention corresponds to the feedback method of the PMI in Embodiment 2, and the same content is not described again.
  • FIG. 6 is a schematic diagram of a feedback device according to an embodiment of the present invention. As shown in FIG. 6, the feedback device 600 of the PMI includes:
  • the indication determining unit 601 determines an OFDM PMI of rank r and a NOMA PMI of rank Nr; wherein r represents the rank of the user equipment, and Nr represents the number of receive antennas of the user equipment and the number of transmit antennas of the base station Minimum value
  • the indication feedback unit 602 feeds back the OFDM PMI and the NOMA PMI to the base station.
  • the NOMA PMI is used to quantize the complete channel matrix of the user equipment itself.
  • the indication determining unit 601 may make the NOMA PMI of the rank Nr and the direction of the channel H2 of the user equipment closest to each other based on the distance criterion.
  • the indication determining unit 601 may be specifically configured to: select W that minimizes Tr(W H , H 2 )/
  • the number of rows of the precoding matrix identified by the NOMA PMI is the number of transmit antennas of the user equipment, and the number of columns is the number of receive antennas of the user equipment.
  • the embodiment of the invention further provides a user equipment, which is provided with the feedback device 600 of the above PMI.
  • FIG. 7 is a schematic diagram of a user equipment according to an embodiment of the present invention.
  • the user device 700 can include a central processing unit 100 and a memory 140; the memory 140 is coupled to the central processing unit 100.
  • the figure is exemplary; other types of structures may be used in addition to or in place of the structure to implement telecommunications functions or other functions.
  • the functionality of the feedback device 600 of the PMI can be integrated into the central processor 100.
  • the central processing unit 100 may be configured to perform control of: determining and feeding back an OFDM PMI of rank r and a NOMA PMI of rank Nr; wherein r represents the rank of the user equipment, and Nr represents the reception of the user equipment The minimum of the number of antennas and the number of transmit antennas of the base station.
  • the feedback device 600 of the PMI can be configured separately from the central processing unit 100, such as
  • the feedback device 600 of the PMI can be configured as a chip connected to the central processing unit 100, and the function of the feedback device 600 of the PMI can be realized by the control of the central processing unit.
  • the user equipment 700 may further include: a communication module 110, an input unit 120, an audio processing unit 130, a memory 140, a camera 150, a display 160, and a power source 170.
  • the functions of the above components are similar to those of the prior art, and are not described herein again. It should be noted that the user equipment 700 does not have to include all the components shown in FIG. 7, and the above components are not required; in addition, the user equipment 700 may further include components not shown in FIG. There are technologies.
  • the user equipment feeds back the OFDM PMI with rank r and the NOMA PMI with rank Nr, and provides reference information for the base station to perform NOMA scheduling, so that the base station can schedule appropriate user equipment to ensure SIC performance.
  • SIC error propagation in a MIMO system using NOMA can be reduced.
  • FIG. 8 is a schematic diagram of a communication system according to an embodiment of the present invention.
  • the communication system 800 includes: a base station 801 and a user equipment 802;
  • the user equipment 802 determines and feeds back an OFDM PMI of rank r and a NOMA PMI of rank Nr; where r represents the rank of the user equipment, and Nr represents the number of receive antennas of the user equipment and the transmit antenna of the base station. The minimum of the number;
  • the base station 801 receives the OFDM PMI and the NOMA PMI fed back by the user equipment 802; and performs NOMA scheduling according to the NOMA PMI fed back by multiple user equipments.
  • the NOMA PMI is used to quantize the complete channel matrix of the user equipment itself.
  • An embodiment of the present invention provides a computer readable program, wherein when the program is executed in a base station, the program causes a computer to execute a receiving method of the PMI as described in Embodiment 1 in the base station.
  • An embodiment of the present invention provides a storage medium storing a computer readable program, wherein the computer readable program causes a computer to execute a receiving method of the PMI as described in Embodiment 1 in a base station.
  • An embodiment of the present invention provides a computer readable program, wherein when the program is executed in a user equipment, the program causes a computer to perform a feedback method of the PMI as described in Embodiment 2 in the user equipment.
  • An embodiment of the present invention provides a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a feedback method of the PMI as described in Embodiment 2 in a user equipment.
  • the above apparatus and method of the present invention may be implemented by hardware or by hardware in combination with software.
  • the present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps.
  • the present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.
  • One or more of the functional blocks described in the figures and/or one or more combinations of functional blocks may be implemented as a general purpose processor, digital signal processor (DSP) for performing the functions described herein.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • One or more of the functional blocks described with respect to the figures and/or one or more combinations of functional blocks may also be implemented as a combination of computing devices, eg, a combination of a DSP and a microprocessor, multiple microprocessors One or more microprocessors in conjunction with DSP communication or any other such configuration.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)

Abstract

L'invention concerne un procédé de rétroaction et de réception, un dispositif et système de communication pour indicateur de matrice de précodage (PMI). Le procédé de rétroaction PMI comprend les étapes suivantes : un équipement utilisateur détermine un multiplexage par répartition de fréquence orthogonale de PMI (OFDM PMI) de rang r et un accès multiple non orthogonal de PMI (NOMA PMI) de rang Nr, et fournit en retour OFDM PMI et NOMA PMI à une station de base, r représentant le numéro de rang de l'équipement utilisateur et Nr représentant la valeur minimale du nombre d'antennes de réception de l'équipement utilisateur et le nombre d'antennes d'émission de la station de base. Ainsi, le fait de fournir des informations de référence pour la programmation NOMA par rapport à la station de base permet à la station de base de programmer l'équipement utilisateur approprié pour garantir les performances de SIC, et réduit la propagation d'erreurs SIC dans un système MIMO utilisant NOMA.
PCT/CN2015/076691 2015-04-16 2015-04-16 Procédé de rétroaction et de réception, dispositif et système de communication pour indicateur de matrice de précodage WO2016165092A1 (fr)

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CN201580077526.2A CN107409009A (zh) 2015-04-16 2015-04-16 预编码矩阵指示的反馈和接收方法、装置以及通信系统
PCT/CN2015/076691 WO2016165092A1 (fr) 2015-04-16 2015-04-16 Procédé de rétroaction et de réception, dispositif et système de communication pour indicateur de matrice de précodage
US15/722,681 US20180026699A1 (en) 2015-04-16 2017-10-02 Methods and Apparatuses for Feeding Back and Receiving Pre-coding Matrix Indicator and Communication System

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